Vacuum cleaner



FIG. 1 is a front perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is an enlarged top view of the vacuum cleaner.

The broken lines shown in the drawings depict portions of the vacuum cleaner that form no part of the claimed design 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 